An examination of abnormal grain growth in low strain nickel-200

Underwood, O.; Madison, J.; Martens, R. M.; Thompson, G. B.; Welsh, S.; Evans, J.

doi:10.1007/s13632-016-0290-0

Title: An examination of abnormal grain growth in low strain nickel-200

Journal Article · Tue Jun 21 00:00:00 EDT 2016 · Metallography, Microstructure and Analysis

DOI:https://doi.org/10.1007/s13632-016-0290-0· OSTI ID:1259673

Underwood, O. ^[1]; Madison, J. ^[1]; Martens, R. M. ^[2]; Thompson, G. B. ^[2]; Welsh, S. ^[3]; Evans, J. ^[3]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
The Univ. of Alabama, Tuscaloosa, AL (United States)
Univ. of Alabama in Huntsville, Huntsville, AL (United States)

Here, this study offers experimental observation of the effect of low strain conditions (ε < 10%) on abnormal grain growth (AGG) in Nickel-200. At such conditions, stored mechanical energy is low within the microstructure enabling one to observe the impact of increasing mechanical deformation on the early onset of AGG compared to a control, or nondeformed, equivalent sample. The onset of AGG was observed to occur at specific pairings of compressive strain and annealing temperature and an empirical relation describing the influence of thermal exposure and strain content was developed. The evolution of low-Σ coincident site lattice (CSL) boundaries and overall grain size distributions are quantified using electron backscatter diffraction preceding, at onset and during ensuing AGG, whereby possible mechanisms for AGG in the low strain regime are offered and discussed.

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Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1259673

Report Number(s):: SAND-2016-2459J; PII: 290

Journal Information:: Metallography, Microstructure and Analysis, Journal Name: Metallography, Microstructure and Analysis; ISSN 2192-9262

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
nickel
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electron backscattered diffraction

Title: An examination of abnormal grain growth in low strain nickel-200

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